dashpay · QuantumExplorer · Aug 6, 2026 · Jul 10, 2026 · Jul 11, 2026 · Jul 16, 2026
@@ -239,6 +239,67 @@ sealed class DashSdkError(
         class NotFound(message: String, cause: Throwable? = null) :
             PlatformWallet(message, cause)
 
+        /**
+         * `ErrorTransactionBroadcastRejected` (native code 26). Core
+         * DEFINITIVELY rejected the core transaction: it is not on the network
+         * and will not get there. The build's UTXO reservation was released and,
+         * on the deferred (BIP70/BIP270) path, the token was consumed at the
+         * same time — so the inputs are spendable again and the token is gone.
+         *
+         * The definitive counterpart to [TransactionBroadcastUnconfirmed] (20),
+         * whose outcome is AMBIGUOUS and which therefore keeps its inputs
+         * reserved. Because the reservation and token are already gone, this is
+         * NOT retryable in place: address the rejection reason carried in the
+         * message, then rebuild with
+         * [buildSignedPayment][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.buildSignedPayment]
+         * (deferred) or re-issue the send.
+         */
+        class TransactionBroadcastRejected(message: String, cause: Throwable? = null) :
+            PlatformWallet(message, cause)
+
+        /**
+         * `ErrorStaleReservationToken` (native code 34). A deferred
+         * (BIP70/BIP270) [broadcastSigned][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.broadcastSigned]
+         * token has outlived its funding reservation's lifetime: key-wallet's
+         * TTL may already have swept and re-selected the inputs, so acting on it
+         * could touch a newer, unrelated reservation. The call did NOT touch the
+         * network. NOT retryable in place — rebuild the payment with
+         * [buildSignedPayment][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.buildSignedPayment].
+         *
+         * Sibling of the other two deferred-token failures this code used to
+         * conflate: [ReservationTokenConsumed] (unknown / already broadcast /
+         * already released) and [ReservationWalletMismatch] (minted against a
+         * different wallet generation).
+         */
+        class StaleReservationToken(message: String, cause: Throwable? = null) :
+            PlatformWallet(message, cause)
+
+        /**
+         * `ErrorReservationTokenConsumed` (native code 35). A deferred
+         * (BIP70/BIP270) [broadcastSigned][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.broadcastSigned]
+         * token is unknown, already broadcast, or already released — the guard
+         * that turns a double-broadcast (or a broadcast after release) into a
+         * typed error instead of a second send. The call did NOT touch the
+         * network. NOT retryable: rebuild the payment with
+         * [buildSignedPayment][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.buildSignedPayment].
+         * (Release is idempotent and never raises this.)
+         */
+        class ReservationTokenConsumed(message: String, cause: Throwable? = null) :
+            PlatformWallet(message, cause)
+
+        /**
+         * `ErrorReservationWalletMismatch` (native code 36). A deferred
+         * (BIP70/BIP270) [broadcastSigned][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.broadcastSigned]
+         * token was minted against a different wallet *generation* than the one
+         * broadcasting it (e.g. a wallet re-created under the same id); its
+         * reservation lives in that other generation's reservation set. The call
+         * did NOT touch the network and did NOT consume the rightful owner's
+         * token. NOT retryable through this handle: rebuild the payment with
+         * [buildSignedPayment][org.dashfoundation.dashsdk.wallet.ManagedPlatformWallet.buildSignedPayment].
+         */
+        class ReservationWalletMismatch(message: String, cause: Throwable? = null) :
+            PlatformWallet(message, cause)
+
         /**
          * Any other `PlatformWalletFFIResultCode` without a dedicated type.
          * Carries the platform-wallet [nativeCode] (already de-offset) and
@@ -335,6 +396,20 @@ sealed class DashSdkError(
             // RAW code via translateManagedIdentityNotFoundToZero (#4051)
             // before this mapping ever runs. BREAKING for Kotlin hosts that
             // caught DashSdkError.NotFound from platform-wallet operations.
+            //
+            // 98 is also what the wallet-was-REMOVED case returns on BOTH
+            // deferred-send paths:
+            //  * deferred (BIP70/BIP270) TOKEN path — a signed-payment broadcast
+            //    whose wallet is no longer registered in the manager, or a
+            //    signed-payment finalize whose wallet was removed while it was
+            //    being signed;
+            //  * finalized-transaction HANDLE (V2) path — a tx-builder finalize
+            //    whose wallet was removed or re-created during signing (no handle
+            //    is published), or a V2 broadcast whose generation is gone.
+            // Every one reconciles the build's UTXO reservation before returning.
+            // Nothing was broadcast, and unlike ReservationWalletMismatch (36)
+            // no other live generation holds the payment either — so it is not
+            // retryable. See dashpay/platform#4185.
             PLATFORM_WALLET_NOT_FOUND_CODE ->
                 PlatformWallet.NotFound(message, cause)
             16 -> PlatformWallet.ShieldedBroadcastFailed(message, cause) // ErrorShieldedBroadcastFailed
@@ -345,6 +420,16 @@ sealed class DashSdkError(
             23 -> PlatformWallet.AssetLockNotTracked(message, cause) // ErrorAssetLockNotTracked
             24 -> PlatformWallet.AssetLockAlreadyConsumed(message, cause) // ErrorAssetLockAlreadyConsumed
             25 -> PlatformWallet.AssetLockFundingMismatch(message, cause) // ErrorAssetLockFundingMismatch
+            26 -> PlatformWallet.TransactionBroadcastRejected(message, cause) // ErrorTransactionBroadcastRejected
+            // The deferred-token trio sits at the contiguous block 34-36 because
+            // 27-33 are claimed elsewhere: 27 ErrorShutdownIncomplete
+            // (dashpay/platform#4268, merged), 29 ErrorAssetLockInsufficientFunds
+            // (#4184), 31 ErrorSigningKeyUnavailable (#4183/#4259), 32
+            // ErrorTransactionBuild (#4247/#4256), 33 ErrorTransactionSigning
+            // (#4256). See packages/rs-platform-wallet-ffi/ERROR_CODE_REGISTRY.md.
+            34 -> PlatformWallet.StaleReservationToken(message, cause) // ErrorStaleReservationToken
+            35 -> PlatformWallet.ReservationTokenConsumed(message, cause) // ErrorReservationTokenConsumed
+            36 -> PlatformWallet.ReservationWalletMismatch(message, cause) // ErrorReservationWalletMismatch
             // ErrorSigningKeyUnavailable — the STRUCTURED signer
             // discriminator (dashpay/platform#4060 finding 7): the typed
             // completion code rides the whole Rust round-trip, no message

@@ -262,6 +262,45 @@ internal object WalletManagerNative {
      */
     external fun coreTransactionFree(tx: Long)
 
+    /**
+     * `core_wallet_signed_payment_finalize` — atomically fund, reserve, sign,
+     * AND register a builder for deferred (BIP70/BIP270) submission in one
+     * native call. Selection and reservation commit as a single unit under the
+     * wallet-manager lock, closing the double-selection window. CONSUMES
+     * [builder]. [accountType]/[accountIndex] identify the funding account
+     * (0 BIP44, 1 BIP32, 2 CoinJoin); [coreSignerHandle] is a
+     * `MnemonicResolverHandle`.
+     *
+     * Returns a big-endian BLOB decoded into a `SignedCoreTransaction`:
+     * `u64 token, u64 feeDuffs, u32 txidLen, txid utf8, u32 txBytesLen, txBytes`.
+     */
+    external fun coreWalletFinalizeSignedPayment(
+        builder: Long,
+        walletHandle: Long,
+        accountType: Int,
+        accountIndex: Int,
+        coreSignerHandle: Long,
+    ): ByteArray
+
+    /**
+     * `core_wallet_signed_payment_broadcast` — broadcast the payment behind
+     * [token], reconciling its reservation on failure and consuming the token.
+     * Rather than double-broadcasting, an unusable token throws one of three
+     * sibling codes — `ErrorStaleReservationToken` (34, aged out),
+     * `ErrorReservationTokenConsumed` (35, already consumed/unknown), or
+     * `ErrorReservationWalletMismatch` (36, different wallet generation).
+     * [coreHandle] must resolve to the wallet the token was minted against.
+     * Returns the txid as a lowercase hex string.
+     */
+    external fun coreWalletBroadcastSignedPayment(coreHandle: Long, token: Long): String
+
+    /**
+     * `core_wallet_signed_payment_release` — release the funding reservation
+     * behind [token] and drop it. Idempotent: releasing an unknown /
+     * already-consumed token is a silent no-op.
+     */
+    external fun coreWalletReleaseSignedPayment(token: Long)
+
     /**
      * Enumerate the wallet's Platform-payment addresses with cached credit
      * balances, as a big-endian blob: `u32 rowCount` then per row

@@ -159,6 +159,57 @@ class CoreTransactionBuilder internal constructor(network: Network) : AutoClosea
         return FinalizedCoreTransaction(transaction, fee)
     }
 
+    /**
+     * Consume this configured builder and, in ONE atomic native operation,
+     * select + reserve + sign the inputs and register the built transaction for
+     * deferred (BIP70/BIP270) submission. The concurrency-safe replacement for
+     * the deprecated [setFunding] + [buildSigned] + register split: selection
+     * and reservation commit as a single unit under the wallet-manager lock, so
+     * concurrent deferred builds cannot double-select an input. Returns the
+     * decoded [ManagedPlatformWallet.SignedCoreTransaction].
+     */
+    internal fun finalizeSignedPayment(
+        wallet: ManagedPlatformWallet,
+        accountType: AccountType,
+        accountIndex: Int,
+        coreSignerHandle: Long,
+    ): ManagedPlatformWallet.SignedCoreTransaction {
+        require(accountIndex >= 0) { "accountIndex must be non-negative" }
+        require(coreSignerHandle != 0L) { "coreSignerHandle must be non-zero" }
+        // Validate every borrowed dependency before transferring builder
+        // ownership. Once getAndSet(0) runs, JNI consumes the native builder.
+        val walletHandle = wallet.handle
+        val builderPtr = handleRef.getAndSet(0)
+        check(builderPtr != 0L) { "CoreTransactionBuilder has been consumed or closed" }
+        val blob = WalletManagerNative.coreWalletFinalizeSignedPayment(
+            builderPtr,
+            walletHandle,
+            accountType.ffiValue,
+            accountIndex,
+            coreSignerHandle,
+        )
+        // Native finalization has ALREADY inserted the payment and committed its
+        // reservation by the time this blob returns; the token only gains its
+        // owning NativeCleaner once fromRegisterBlob finishes constructing the
+        // SignedCoreTransaction. So if construction throws (allocation failure, a
+        // malformed blob from an ABI mismatch, or Cleaner-registration failure)
+        // the native token would be registered with no JVM owner able to release
+        // it, leaking the reservation until key-wallet's TTL. Parse the token
+        // first (its 8 big-endian bytes lead the blob) and release it defensively
+        // if ownership construction fails, mirroring the owner-guarded release on
+        // the rest of the deferred path (dashpay/platform#4185).
+        var token: Long? = null
+        return try {
+            token = java.nio.ByteBuffer.wrap(blob).long
+            ManagedPlatformWallet.SignedCoreTransaction.fromRegisterBlob(blob)
+        } catch (error: Throwable) {
+            token?.let { value ->
+                runCatching { WalletManagerNative.coreWalletReleaseSignedPayment(value) }
+            }
+            throw error
+        }
+    }
+
     override fun close() {
         cleanable.clean()
     }

@@ -55,6 +55,19 @@ class ManagedCoreWallet internal constructor(handle: Long) : AutoCloseable {
         )
     }
 
+    /**
+     * Broadcast the deferred payment behind [token] and return its txid. An
+     * unusable token surfaces as one of the three sibling deferred-token
+     * errors — aged out
+     * ([org.dashfoundation.dashsdk.errors.DashSdkError.PlatformWallet.StaleReservationToken]),
+     * already consumed / unknown
+     * ([org.dashfoundation.dashsdk.errors.DashSdkError.PlatformWallet.ReservationTokenConsumed]),
+     * or a different wallet generation
+     * ([org.dashfoundation.dashsdk.errors.DashSdkError.PlatformWallet.ReservationWalletMismatch]).
+     */
+    internal fun broadcastSignedPayment(token: Long): String =
+        WalletManagerNative.coreWalletBroadcastSignedPayment(handle, token)
+
     override fun close() {
         cleanable.clean()
     }